Not very many people. Those terms are relatively rare compared to the overused term "date rape", which was coined to lower the evidentiary standards for rape, and which resulted in some absurd rules adopted by colleges that required a request for approval at each step in the progression toward consensual sex (Antioch College in Ohio).
"Date rape" was a PC, feminist initiative and it became part of absurd rules on several college campuses.
I’m going to guess that you haven’t had any college-aged daughters.
Yes, academia and liberalism are rife with silly PC excesses, but that doesn’t mean that it’s not legitimate to clarify when the perpetrator of rape was someone known in a date situation.
Jeesh!